GTA IV is notoriously poorly optimized on PC. Adding unofficial compression increases the risk of "CRC Errors" during installation or "fatal errors" during gameplay because a specific file was "ripped" out. Security Risks: Source Integrity:
A command prompt window will open and begin reconstructing the compressed game assets. gta iv rip7z install
Look for a file named setup.bat , install.bat , or unpak.bat inside the extracted folder. GTA IV is notoriously poorly optimized on PC